Examples of org.bukkit.event.player.PlayerCommandPreprocessEvent

org.bukkit.event.player.PlayerCommandPreprocessEvent
This event is called whenever a player runs a command (by placing a slash at the start of their message). It is called early in the command handling process, and modifications in this event (via {@link #setMessage(String)}) will be shown in the behavior.
Many plugins will have no use for this event, and you should attempt to avoid using it if it is not necessary.
Some examples of valid uses for this event are:
- Logging executed commands to a separate file
- Variable substitution. For example, replacing ${nearbyPlayer} with the name of the nearest other player, or simulating the @a and @p decorators used by Command Blocks in plugins that do not handle it.
- Conditionally blocking commands belonging to other plugins. For example, blocking the use of the /home command in a combat arena.
- Per-sender command aliases. For example, after a player runs the command /calias cr gamemode creative, the next time they run /cr, it gets replaced into /gamemode creative. (Global command aliases should be done by registering the alias.)
Examples of incorrect uses are:
- Using this event to run command logic
If the event is cancelled, processing of the command will halt.
The state of whether or not there is a slash (/) at the beginning of the message should be preserved. If a slash is added or removed, unexpected behavior may result.


        switch (Type.valueOf(type.asString())) {


        case AS_PLAYER:
            try {
                PlayerCommandPreprocessEvent pcpe = new PlayerCommandPreprocessEvent(((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity(), "/" + command);
                Bukkit.getPluginManager().callEvent(pcpe);
                if (!pcpe.isCancelled())
                    ((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity().performCommand(
                            pcpe.getMessage().startsWith("/") ? pcpe.getMessage().substring(1): pcpe.getMessage());
            }
            catch (Throwable e) {
                dB.echoError(scriptEntry.getResidingQueue(), "Exception while executing command as player.");
                dB.echoError(scriptEntry.getResidingQueue(), e);
            }
            return;


        case AS_OP:
            boolean isOp = ((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity().isOp();
            if (!isOp) ((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity().setOp(true);
            try {
                PlayerCommandPreprocessEvent pcpe = new PlayerCommandPreprocessEvent(((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity(), "/" + command);
                Bukkit.getPluginManager().callEvent(pcpe);
                if (!pcpe.isCancelled())
                    ((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity().performCommand(
                            pcpe.getMessage().startsWith("/") ? pcpe.getMessage().substring(1): pcpe.getMessage());
            }
            catch (Throwable e) {
                dB.echoError(scriptEntry.getResidingQueue(), "Exception while executing command as OP.");
                dB.echoError(scriptEntry.getResidingQueue(), e);
            }

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   * @return Whether the command was run
   */
  public final static boolean dispatchCommand(final CommandSender sender, final String command) {
    try {
      if (sender instanceof Player) {
        final PlayerCommandPreprocessEvent e = new PlayerCommandPreprocessEvent((Player) sender, "/" + command);
        Bukkit.getPluginManager().callEvent(e);
        if (e.isCancelled() || e.getMessage() == null || !e.getMessage().startsWith("/"))
          return false;
        return Bukkit.dispatchCommand(e.getPlayer(), e.getMessage().substring(1));
      } else {
        final ServerCommandEvent e = new ServerCommandEvent(sender, command);
        Bukkit.getPluginManager().callEvent(e);
        if (e.getCommand() == null || e.getCommand().isEmpty())
          return false;
        return Bukkit.dispatchCommand(e.getSender(), e.getCommand());
      }
    } catch (final Exception ex) {
      ex.printStackTrace(); // just like Bukkit
      return false;
    }

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